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  1. ,
    Expert tip

    Try indicating constructor to use @JsonCreator annotation.

  2. ,

    The easiest solution is to provide a default constructor for the class you want to convert from/to json.

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com.fasterxml.jackson.databind.JsonMappingException: No suitable constructor found for type [simple type, class learning.firebase.app.learningfirebase.Chat]: can not instantiate from JSON object (need to add/enable type information?)
     at [Source: java.io.StringReader@42285cd8; line: 1, column: 2]	at com.fasterxml.jackson.databind.deser.BeanDeserializerBase.deserializeFromObjectUsingNonDefault(BeanDeserializerBase.java:984)	at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserializeFromObject(BeanDeserializer.java:276)	at com.fasterxml.jackson.databind.deser.BeanDeserializer.deserialize(BeanDeserializer.java:121)	at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:2888)	at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2034)	at com.firebase.client.DataSnapshot.getValue(DataSnapshot.java:181)	at learning.firebase.app.learningfirebase.FirebaseListAdapter$1.onChildAdded(FirebaseListAdapter.java:63)	at com.firebase.client.core.ChildEventRegistration.fireEvent(ChildEventRegistration.java:48)	at com.firebase.client.core.view.DataEvent.fire(DataEvent.java:45)	at com.firebase.client.core.view.EventRaiser$1.run(EventRaiser.java:38)	at android.os.Handler.handleCallback(Handler.java:725)	at android.os.Handler.dispatchMessage(Handler.java:92)	at android.os.Looper.loop(Looper.java:176)	at android.app.ActivityThread.main(ActivityThread.java:5365)	at java.lang.reflect.Method.invokeNative(Native Method)	at java.lang.reflect.Method.invoke(Method.java:511)	at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)	at dalvik.system.NativeStart.main(Native Method)